1998 Mercury Mystique LS 2.5L MIL Lamp on
rec'd from used car dealer. has been to other shops. fuel filter,all o2 sensors,coolant sensor,spark plugs and wires replaced. we have seen these codes on other tech help requests. does ford have a pattern failure problem that sets po171 and po174? we have a 2...
FIX posted 2/3/2004
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Message Closed w/FIX
Vehicle Data1998 Mercury Mystique LS
Trouble Codes
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Message Closed w/FIX
Vehicle Data
1998 Mercury Mystique LS
VIN | 1MEFM66L7W |
Engine | 2.5 L / 6 cyl / GAS |
Trans | 4-speed Automatic (Electronic) |
Delivery | FI |
Emissions | OBD-II Compliant |
Symptoms | MIL Lamp On |
Occurs | Always |
Trouble Codes
P0171 | Fuel System Too Lean (Bank 1) |
P0174 | Fuel System Too Lean (Bank 2) |